If you are a crafter I can't stress this enough, make sure to get loads of shards and crystals. Nothing stinks more than running out when you're on a good leveling streak. I spent the last 2 weeks getting over 2000 shards and crystals of each type. I was only able to get about 130 clusters of each type (which I don't think are going to be used at all or much from 50-60).